/Engine/Source/Editor/BlueprintGraph/Classes/K2Node_Tunnel.h
Queries if a user defined pin of the passed type can be constructed on this node. Node will return false by default and must opt into this functionality
TRUE if a user defined pin can be constructed
virtual bool CanCreateUserDefinedPin ( const [FEdGraphPinType](API\Runtime\Engine\EdGraph\FEdGraphPinType) & InPinType, EEdGraphPinDirection InDesiredDirection, [FText](API\Runtime\Core\Internationalization\FText) & OutErrorMessage )